Flatline is a Decepticon medic and field doctor in the Transformers series. He is known for his cold, clinical demeanor and his willingness to perform brutal repairs or experiments if they serve his purposes. Rather than showing compassion, Flatline treats injury and machinery with detached efficiency, making him a dangerous ally and an unsettling enemy. He often appears in roles involving medical support, interrogation, or technical maintenance for the Decepticons.